Setting the level of fill in a cup used with a beverage dispenser

ABSTRACT

A device for filling a receptacle with a beverage and a user interface for allowing a user to select a desired level of fill of beverage in the receptacle. The interface includes a mechanism for detecting an object below the outlet, such that the receptacle can be filled with the beverage up to the user selected level of fill, wherein the detection mechanism is arranged to detect a position of a human finger or a hand-held freely movable pointing instrument, which human finger or pointing instrument is adjacent to and pointing towards a side of the receptacle, so that the level of fill of the receptacle is determined from the detected position of the finger or pointing instrument the user-selected level of fill and the beverage is dispensed to fill the receptacle up to that level. The device is useful in coffee or other beverage dispensing machines.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a divisional of application Ser. No. 12/988,492filed Oct. 18, 2010, which is the 371 U.S. National Phase ofPCT/EP2009/055377, filed May 5, 2009, which claims priority of Europeanpatent applications EP 08155851.2 filed May 8, 2008 and EP 08159707.2filed Jul. 4, 2008.

FIELD OF THE INVENTION

The field of the invention pertains to the setting of the level of fillin cups used with a beverage preparation devices, such as coffeemachines or similar apparatus.

BACKGROUND ART

Certain beverage preparation machines use capsules containingingredients to be extracted or to be dissolved; for other machines, theingredients are stored and dosed automatically in the machine or elseare added at the time of preparation of the drink.

Most coffee machines possess filling means that include a pump forliquid, usually water, which pumps the liquid from a source of waterthat is cold or indeed heated through heating means, such as a heatingresistor, a thermoblock or the like.

The fill of a drink in the receptacle, such as a cup or glass, isusually controlled in several different ways.

In certain modes, the control of fill may be done by storing severalfill programs in a controller which itself commands the time ofactivation of the pump and deactivates the pump via a relay. A drawbackcomes from the fact that depending on the state of the machine, forexample the degree of limescale, the volumes actually delivered may varysignificantly. As a consequence, the fill control is customarily doneusing a flow meter and by a control unit which counts down the number ofpulses recorded on the flow meter positioned on the fluid supplycircuit. However, a drawback is that it is necessary to provide a seriesof operating buttons depending on the number of different volumes to bedelivered. For example, in a conventional coffee machine, a “ristretto”button is required for extra-short coffees (25 mL), an “espresso” buttonfor short coffees (40 mL) and a “long” button for long coffees (110 mL).There is a real risk of confusion by the user unaccustomed to using themachine; this typically leads to the delivery of excessively strongcoffees or to overspills from the cup. Another drawback arises from thelack of flexibility in respect of the user who may want an intermediatevolume depending on the type of capsule or drink chosen. The flow metermay also lack accuracy or its accuracy be impaired on account of thescale which builds up on its surfaces. Another drawback arises from thefact that control by flow meter takes no account of the quantity offroth produced; this may lead to a spillover of froth for very frothyproducts.

Another mode consists in providing manual activation and deactivation ofthe pump by a button, a lever or some other operating means. Statedotherwise, the user alone is responsible for halting the flow of drinkinto the cup. However, this raises several drawbacks. One is that theuser must remain attentive during the flow of the drink; without this,the system continues to deliver liquid: the risks of spillover aretherefore fairly common. Another drawback arises from the fact thatmanual control such as this is inaccurate. The user may then encounterdifficulties in reproducing the fill that he usually desires especiallywhen the drink may produce more or less froth; this may fool the user inthe control of the filling of the cup with liquid.

Another mode of control which is more complex and more expensive toimplement consists of a means of recognition on a packaged portion ofingredients (for example, a capsule), such as a bar code, whichtransmits instructions to the machine, so as to tailor the volume to bedelivered. In the same way, this system works on the activation of apump using recorded programs and on the acquisition of data originatingfrom a flow meter.

Various systems for operating a beverage preparation device and forfilling automatically a receptacle are disclosed in the patentliterature, for instance in AT 410 377, DE 44 29 353, DE 20 2006 019039, EP 1 305 040, EP 1 448 084, EP 1 676 509, FR 2 624 844, GB 2 397510, U.S. Pat. No. 4,458,735, U.S. Pat. No. 4,767,632, U.S. Pat. No.5,312,020, U.S. Pat. No. 5,335,705, U.S. Pat. No. 5,372,061, U.S. Pat.No. 5,375,508, U.S. Pat. No. 5,731,981, U.S. Pat. No. 5,645,230, U.S.Pat. No. 5,836,236, U.S. Pat. No. 5,959,869, U.S. Pat. No. 6,182,555,U.S. Pat. No. 6,354,341, U.S. Pat. No. 6,759,072, US 2007/0157820, WO97/25634, WO99/50172, WO 2004/030435, WO 2004/030438, WO 2006/063645, WO2006/090183, WO 2007/003062, WO 2007/003990 and PCT/EP08/054858.

More specifically, U.S. Pat. No. 4,458,735 pertains to a device forautomatically controlling the delivery of a drink such as a “milkshake”into a container made of translucent paper or foam. The receptacle ispositioned under a source of radiation which directs a light ray againstthe rim of the receptacle; which ray passes through the receptacle andis detected by a radiation detector situated on the opposite side of thereceptacle. The signal received by the detector is compared with asignal value level and when the attenuated signal drops below the signalvalue level, delivery is halted. Such a device does not allow sufficientdetection accuracy, in particular, for coffee receptacles, on account ofthe way in which the incident signal is detected and then compared.Moreover, this device is unsuitable for translucent receptacles.Finally, the device does not make it possible to choose one's fillposition.

Patent application WO 97/25634 pertains to a method and a device fordetecting the position of an object such as a container in a targetwindow using the concept of triangulation of radiant energy. Such adevice uses a first pair and a second pair of emitters and receivers anduses a triangulation calculation to detect the presence of thecontainer. WO99/50172 discloses a method for detecting and control thefilling of a cup with a dispensing apparatus by using a several lighttransmitters and receivers of light rays reflected by the cup and liquidinside the cup.

Co-pending application PCT/EP08/054858 (in the name of Nestec SA)discloses a beverage preparation device having a touch screen with avirtual representation of a cup on which the user can move up and down adesired level of fill before the beverage dispensing process isinitiated to fill the cup to the desired level.

WO 2006/063645 (in the name of Nestec SA) discloses a beveragepreparation machine with an interface for selecting the level of fill ofa cup to be filled. In one embodiment, a marking means for indicatingthe desired level of fill on a side of the cup is provided in the formof a user-operable laser beam emitter that forms a displaceable visiblespot on the inner side of the cup. The user-operable emitter cooperateswith a receiver for detecting the presence of the beverage supplied tothe cup when the beverage reaches the desired level of fill to interruptthe supply of the beverage.

SUMMARY OF THE INVENTION

It is therefore a preferred object of the present invention to increasethe user-friendliness and the intuitiveness of the selection arrangementof the desired levels of fill in cups of various sizes used in abeverage preparation device.

It is a particular object of the invention to provide a level of fillselection arrangement for various cup sizes which does not need to bepreprogrammed as to the cup sizes by the user but which is immediatelyadaptable with any cup size used by the user.

The invention thus relates to a device for filling a receptacle with abeverage. For instance, the beverage device is a coffee, tea or soupmachine, in particular a machine for supplying a beverage by passing hotor cold water or another liquid through a capsule containing aningredient of the beverage to be supplied, such as ground coffee.

The beverage device comprises means for filling via an outlet areceptacle located below the outlet and a user interface for allowing auser to select a desired level of fill of beverage in the receptacle.The interface comprises a means for detecting an object below theoutlet. The filling means are arranged to fill the receptacle up to theuser selected level of fill.

In accordance with the invention, the detecting means is arranged todetect a position of a human finger and/or a hand-held freely movablepointing instrument, which human finger or pointing instrument is/areadjacent to and pointing towards a side of the receptacle. The fillingmeans is arranged to derive from the detected position of the fingerand/or pointing instrument the user-selected level of fill and to fillthe receptacle up to said level.

Such pointing instrument may typically be a stylus or a kitchen utensilsuch as a tea or coffee spoon, or any other device freely manipulatableby the user to point at a location on a cup representative of a desiredlevel of fill and allow acquisition of this level of fill by the machinefor the subsequent filling of the cup.

Being able to indicate the desired level of fill by pointing with afinger and/or pointing instrument directly to the location of thedesired level on the cup to be filled, instead of having to provide thisinformation by operating buttons, a touch screen or a laser pointingdevice, represents a significant increase of the user-friendliness andintuitiveness of the handling of a beverage preparation machine.

To avoid overflow of the receptacle due to an improper level of fillinput or to allow non selection of an amount of beverage to be suppliedto the machine if the user suddenly changes its mind, the beveragedevice includes a detector arranged to detect the height of thereceptacle, the means for filling being arranged to fill said receptacleonly if the detected position of the finger and/or pointing instrumentrepresenting the user-selected level of fill is located below thedetected height of the receptacle. The finger and/or pointing instrumentdetecting means optionally forms also this height detector so that noadditional detector is needed.

The beverage device may also include a detector arranged to detect thepresence of the receptacle under the outlet of the filling means duringa beverage filling cycle. In such a case, the filling means can bearranged to stop the filling when the receptacle is moved away fromunder the outlet. Optionally, the finger and/or pointing instrumentdetecting means forms also the presence detector to avoid an additionaldetector.

To determine which level of fill is selected by the user, for examplewhen the user is hesitating and moves his pointing finger and/orpointing instrument up and down along the cup, the detecting means canbe arranged to detect a withdrawal motion of the pointing finger and/orpointing instrument from adjacent said receptacle, the filling meansbeing arranged to fill the receptacle to a level corresponding to theposition of the pointing finger and/or pointing instrument immediatelybefore its withdrawal. In other words, in this embodiment, it is theposition of the pointing finger and/or pointing instrument at withdrawalthat is decisive for setting the desired level of fill within thereceptacle.

Furthermore, the beverage device may also comprise a detector of abeverage level in the receptacle during filling so as to accuratelymonitor the progress of filling in the receptacle. Optionally, thefinger detecting means forms also this level detector.

To even further increase the intuitive handling of the beveragepreparation device, a user-interface may be incorporated to provide afeed-back arrangement to the user as to the position of the fingerand/or pointing instrument relative to said receptacle and/or as to thelevel of beverage in said receptacle. Such a user-interface optionallyincludes a screen or a touch screen. A suitable feed-back arrangementmay comprise a means, such as an laser or LED, for generating auser-visible light spot on an inner wall of the receptacle preferably ata level in the receptacle corresponding to the user-selected level offill and the level to which the receptacle will be filled by thebeverage device.

Still in the view of increasing the intuitiveness and user-friendlinessof the beverage preparation device, the user-interface can be arrangedto provide a graphical representation of a receptacle and at least onerepresentation of a level in the receptacle. At least one levelrepresentation may follow any vertical motion of the pointing fingerand/or pointing instrument along and adjacent a side of this virtualreceptacle. This level representation optionally includes arepresentation of a finger and/or pointing instrument, for example ahand with a pointing finger or a stylus, against the representation ofthe receptacle. At least one level representation indicative of thelevel of beverage during filling in this virtual receptacle can bearranged to rise in accordance with the filling of the beverage in thereal receptacle. In this case, the level representation may simply be ahorizontal line or bar that moves upwards in the representation of thereceptacle.

The finger and/or pointing instrument detecting means may include anysuitable detector of objects known to the skilled person, in particularin the references set out in the above discussion on the prior art. Thefinger and/or pointing instrument detecting means may include a lightdetector, such as one or more cameras, and optionally a light emitter.For instance, the finger and/or pointing instrument detecting meansincludes a series of photo-emitters for emitting visible or non visiblelight beams and a corresponding series of photo-receivers for detectingthe presence (or absence) and location of the light beams emitted by theemitters. When the machine is intended to be used with a pointinginstrument, the detecting means may be specially arranged to detect theposition of such an instrument nearby a cup, for instance by radiofrequency or more generally magnetically, especially when the pointinginstrument is made of or includes an electromagnetic part or even anRFID module.

To even further increase the intuitiveness and user-friendliness, thefilling means may be arranged so that the selected level of fill may bechanged by a user during the filling of the receptacle, in particularvia the finger and/or pointing instrument detector means, or even viaanother interface such as a switch.

The finger and/or pointing instrument detecting means can be arranged todetect a vertical position of the pointing finger indicative of theuser-selected level of fill and optionally a horizontal position of thepointing finger and/or pointing instrument indicative of anotherparameter of a beverage to be filled in the receptacle, such as atemperature, strength or mixing ratio of the beverage. The finger and/orpointing instrument detecting means can be arranged to detect thishorizontal position of the pointing finger and/or pointing instrument ina peripheral space outside and adjacent the receptacle. In the case of acoffee machine, the machine may acquire the level of fill from thevertical position of the pointing finger and/or pointing instrument andthe strength of the coffee from the horizontal position around thereceptacle. For instance, if the user points with his finger and/orpointing instrument towards the left of the cup, a weaker coffee will beserved, whereas if he points towards the right of the cup, a strongercoffee will be served. In the same manner, the user may select theproportions of milk or coffee in a milk coffee or cappuccino.

Of course, to increase the user-friendliness, the beverage device may befitted with a screen that provides the relevant input instruction orfeed-back so as to guide and/or reassure the user on the proper handlingof the beverage preparation device and avoid unnecessary stress orinsecurity for the user.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will now be described with reference to the schematicdrawings, wherein:

FIG. 1 shows part of a beverage preparation device according to theinvention while a level of fill is being selected by a user pointing ata cup with his finger;

FIG. 2 shows the beverage preparation device of FIG. 1 while a beverageis being dispensed; and

FIG. 3 shows part of a beverage preparation device according to theinvention while a level of fill is being selected by a user pointing ata cup with a stylus.

DETAILED DESCRIPTION OF THE INVENTION

FIGS. 1 and 2 show a beverage preparation device 1 in accordance withthe invention, such as a coffee machine for the extraction of coffeefrom a capsule containing ground coffee, FIG. 1 illustrating auser-selection of a certain amount of beverage to be dispensed by device1, FIG. 2 showing the dispensing of beverage to fill the cup up to theuser-selected amount of beverage.

Device 1 has a liquid circulation system with a beverage filling meansincluding a water reservoir, pump, heater and extraction chamberconnected through a water conduit for guiding water form the reservoirto the chamber via pump and heater (not shown). The extraction chamberis arranged to supply beverage prepared therein to an outlet 8 which islocated above a drip tray covered with a grid 15 for supporting a cup 18under outlet 8. The beverage filling means further includes a controller(not shown) for controlling various parameters of device 1, includingparameters for the beverage preparation process, such as the control ofthe pump and the heater.

Moreover, device 1 has a user interface 30 c,30 d for allowing a user toselect a desired level of fill of beverage in cup 18, level of fillbeing indicated by dashed line 25 in FIG. 1. Interface 30 c,30 dcomprises a first column of emitters 30 c of light rays 30′,30″, e.g. acolumn of LEDs, facing a second column of light ray detectors 30 d, e.g.a column of photo-detectors. Emitter 30 c and detector 30 d are locatedin the front and on each side of outlet 8 and cup 18.

This interface 30 c,30 d is arranged to detect the vertical position ofan object, in the present case a human finger 5 pointing on a side ofcup 18. To select a level of fill 25, the user sticks his finer 5 into aspace containing cup 18 which space is located below the outlet 8 anddelimited by columns 30 c,30 d. Emitter column 30 c emits a series oflight beams 30′,30″ towards detector column 30 d which may then detectwhich of the rays 30′,30″ are received and which are interrupted at acertain height by the presence of the pointing finger 5. The interruptedrays 30″ of the series or rays 30′,30″ indicate the height of theinterrupting pointing finger 5. The filling means' controller isarranged to control the liquid circulation system so as to prepare andsupply an amount of beverage 23,24 up to the user-selected level of fill25.

The controller of device 1 may be so arranged that the beveragepreparation cycle and supply starts automatically with the acquisitionof level of fill 25, or the controller may be arranged to expect aconfirmation by the user before starting the beverage preparation andsupply cycle.

Device 1 further has a pair of combined light emitters and cameras 30a,30 b arranged to detect the height of the rim 18 a of cup 18 to befilled via deflected ray 30″″, for instance by a triangulation system orimage recognition system of the type known in the art. Alternatively,the device may comprise a second pair of columns, e.g. similar tocolumns 30 c,30 d, arranged on opposite sides of cup 18 to measure itsheight. The controller of the filling means is arranged to initiate thefilling process of cup 18 only if the detected finger level 25 viainterrupted ray 30″ is located below rim 18 a of cup 18, the fingerdetecting means forming optionally the height detector of cup 18, forinstance when the finger detector is a camera with an image recognitionsystem. Thus, if the user selects by mistake a level of fill thatexceeds the cup's capacity, the beverage preparation device will notstart a beverage preparation cycle.

As mentioned, the vertical and optionally horizontal position of finger5 may also be measured with light emitters and cameras 30 a,30 b (orjust cameras) and an image recognition system.

The controller and detector for measuring the position of the pointingfinger 5 on cup 18 may be arranged to detect a withdrawal motion offinger 5 from adjacent cup 18, the filling means being arranged to fillcup 18 to a level 25 corresponding to the position of pointing finger 5immediately before its withdrawal. In such a way, the user is allowed tomove his finger up and down cup 18 to make up his mind beforeacquisition by the controller of the desired level of fill 25.

Moreover, device 1 includes a detector, which in the present case isformed by the above light emitters and cameras 30 a and 30 b, fordetecting when the rising level of beverage 24 in cup 18 reaches, duringa beverage preparation cycle, level of fill 25 selected by a user withits finger 5 on cup 18, for example as taught in the abovementioned WO2006/063645.

Detector 30 a,30 b for measuring the height of rim 18 a of cup 18 ordetector 30 c,30 d for measuring the position of finger 5 can also beused to detect any attempt to remove cup 18 from underneath outlet 8during a beverage filling cycle and interrupt this cycle.

To increase the user-friendliness and intuitive handling of device 1, anintuitive feed-back arrangement 4,30 a for comforting the user isprovided.

As shown, in FIGS. 1 and 2, the feed back arrangement may including aray emitter 30 a emitting a ray 30′″ that forms a visible light spotinside cup 18 indicative of the user-selected level 25 and at the samelevel in cup 18. Hence, emitter 30 a may be arranged to follow verticalmovements of finger 5, direct ray 30′″ and thus the resulting light spoton the inner wall of cup 18 accordingly, until the desired height oflevel fill 25 has been acquired for dispensing the beverage 23.

Moreover, the feed-back arrangement may also include a screen, inparticular a touch screen, 4 that provides a graphic representation of acup 19 to be filled and the representation of the level of beverageand/or the level of fill 20 in cup 19 during the filling process of cup18. Cup 19 may be associated with an indication of the level of fill, onits side, in the form of a graphic representation of an arrow, apointing finger or a similar graphical representation 20 a on a side ofcup 19, for representing the position of the user's finger 5 on cup 18,that may possibly be moving up and down along the side of cup 18 withcorresponding movements of finger 5, which movements are thusrepresented on screen 4. The same may provided for the virtual level offill 20.

Also indicate on screen 4 is the cup's rim 19 a and a maximum level offill 20′, above which device 1 will refuse to dispense a beverage. Thedimensions, in particular the height, of virtual cup 19 with respect tolevel of fill 20 correspond in proportions to those of cup 18 withrespect to its rim 18 a and its user-selected level of fill 25.

Furthermore, during the filling cycle, the virtual representation of cup19 may include not only the representation of the intended level of fill20 but also a representation of the beverage 22 with its rising level 21that is being supplied to the virtual cup 19 in line with the progressof beverage supply 23 to cup 18 and the rising level of beverage 24therein.

Screen 4 may also include further features. In particular, when thefinger detector is not only arranged to detect the height of a finger toset the amount of beverage but also the horizontal location of thefinger around the cup to set another parameter of the beveragepreparation, e.g. temperature, strength, concentration, etc. . . . ,this parameter may also be indicated on the feed-back screen, forinstance with a virtual cursor on an horizontal scale. Moreover, thescreen may also conceived to accept user data input regarding parametersas to the beverage preparation or as to service processes, etc. . . . ,for instance as disclosed in the abovementioned PCT/EP08/054858.

In a variation, emitters and receivers 30 a,30 b are used to detect theposition of the pointing finger 5, for instance by an automatic imagerecognition. As mentioned above, it may be possible to detect not onlythe height of the pointing finger but also its horizontal locationaround cup 18, e.g. more or less on the left, at the front or on theright of the cup.

FIG. 3, in which the same numeric references designate the sameelements, illustrates how a user may set the desired level of fill in acup by pointing at a cup with a freely movable pointing instrument suchas a stylus 5′. The user may also use another instrument such as tea orcoffee spoon.

As shown in FIG. 3, the detecting system of machine 1 is similar to theone shown above. However, for detecting such a pointing instrument ordevice it is possible to use dedicated systems, in particular base on amagnetic field or radio frequency as discussed above.

What is claimed is:
 1. A device for filling a receptacle with a beveragecomprising means for filling via an outlet a receptacle located belowthe outlet and a user interface for allowing a user to select a desiredlevel of fill of beverage in the receptacle, the interface comprisingmeans for detecting an object below the outlet, the filling means beingarranged to fill the receptacle up to the user selected level of fill,wherein the detecting means is arranged to detect a position of a humanfinger or a hand-held freely movable pointing instrument, which humanfinger or pointing instrument is adjacent to and pointing towards a sideof the receptacle, with the filling means being arranged to derive fromthe detected position of the finger or pointing instrument theuser-selected level of fill and to fill the receptacle up to the level.2. The device of claim 1, which further comprises a detector arranged todetect the height of the receptacle, the means for filling beingarranged to fill the receptacle only if the detected position of thefinger or pointing instrument represent the user-selected level of filland is located below the detected height of the receptacle, with thefinger or pointing instrument detecting means optionally forming theheight detector.
 3. The device of claim 1, which further comprises adetector arranged to detect the presence of the receptacle under theoutlet of the filling means, the filling means being arranged to stopfilling when the receptacle is moved away from under the outlet, withthe finger or pointing instrument detecting means optionally forming thepresence detector.
 4. The device of claim 1, wherein the detecting meansis arranged to detect a withdrawal motion of the pointing finger orpointing instrument from adjacent the receptacle, with the filling meansbeing arranged to fill the receptacle to a level corresponding to theposition of the pointing finger or pointing instrument immediatelybefore its withdrawal.
 5. The device of claim 1, which further comprisesa detector of beverage level in the receptacle during filling, with thefinger or pointing instrument detecting means optionally forming thelevel detector.
 6. The device of claim 1, wherein the user-interface isarranged to provide a feed-back to the user as to the position of thefinger or pointing instrument relative either to the receptacle or as tothe level of beverage in the receptacle, with the user-interfaceoptionally including a screen or a touch screen.
 7. The device of claim1, wherein the feed-back includes the formation of a user-visible lightspot on an inner wall of the receptacle.
 8. The device of claim 7,wherein the user-interface is arranged to provide a representation of areceptacle and at least one representation of a level in the receptacle.9. The device of claim 8, wherein at least one level representationfollows any vertical motion of the pointing finger or pointinginstrument along and adjacent a side of the receptacle, with the levelrepresentation optionally including a representation of a finger orpointing instrument.
 10. The device of claim 8, wherein at least onelevel representation indicative of the level of beverage in thereceptacle during filling is arranged to rise in accordance with thefilling of the receptacle.
 11. The device of claim 1, wherein the fingeror pointing instrument detecting means includes a light detector
 12. Thedevice of claim 11, wherein the finger or pointing instrument detectingmeans includes a light emitter.
 13. The device of claim 1, wherein thefinger or pointing instrument detecting means includes a series ofphoto-emitters for emitting light beams and a corresponding series ofphoto-receivers for detecting the light beams emitted by the emitters.14. The device of claim 1, wherein the selected level of fill may bechanged by a user during the filling of the receptacle via the finger orpointing instrument detecting means.
 15. The device of claim 1, whereinthe finger or pointing instrument detecting means is arranged to detecta vertical position of the pointing finger or pointing instrumentindicative of the user-selected level of fill.
 16. The device of claim15, wherein the finger or pointing instrument detecting means isarranged to detect a horizontal position of the pointing finger orpointing instrument indicative of a different parameter of a beverage tobe filled in the receptacle, with the parameter including temperature,beverage strength or mixing ratio of the beverage.
 17. The device ofclaim 15, wherein the finger or pointing instrument detecting means isarranged to detect the horizontal position of the pointing finger orpointing instrument in a peripheral space outside and adjacent thereceptacle.
 18. A device for filling a receptacle with a beveragecomprising a mechanism for filling via an outlet a receptacle locatedbelow the outlet and a user interface for allowing a user to select adesired level of fill of beverage in the receptacle, the interfacecomprising an object detector for detecting an object below the outlet,the filling mechanism being arranged to fill the receptacle up to theuser selected level of fill, wherein the object detector means isarranged to detect a position of a human finger or a hand-held freelymovable pointing instrument, which human finger or pointing instrumentis adjacent to and pointing towards a side of the receptacle, with thefilling mechanism being arranged to derive from the detected position ofthe finger or pointing instrument the user-selected level of fill and tofill the receptacle up to the level.
 19. A coffee machine that includesthe device of claim
 1. 20. A coffee machine that includes the device ofclaim 18.